Embraer EMB145 Operation Manual page 1937

POWERPLANT
OPERATION LOGIC
Each FADEC will command Maximum Reverse thrust on ground only,
when the associated thrust reverser is deployed and associated thrust
lever is requesting reverse thrust whenever either of the following
conditions are met:
- Airplane on the ground indication from both main landing gears, and
main landing gear wheels running above 25 kt, or
- Airplane on the ground indication from both main landing gears and
from nose landing gear.
During landing, when the Thrust Levers are set to below IDLE, the
FADEC commands reverse thrust only after the Thrust Reverser doors
(both engines) are completely deployed. If the Thrust Lever is
requesting forward thrust, the FADEC will command IDLE thrust if the
associated engine thrust reverser indicates that there is a ¨not stowed¨
or a ¨deployed¨ condition.
If one engine is inoperative or one thrust reverser is not deployed, the
FADEC of the operative side will only command Reverse Thrust if the
associated Thrust Lever is requesting reverse thrust and the Thrust
Lever of the affected side is set to IDLE. Such a feature is provided to
avoid uncommanded thrust asymmetry.
EICAS INDICATION
An indication of right and left thrust reversers deployed is presented on
the EICAS. If a failure or a disagreement is detected, a caution
message is presented on the EICAS.
Page
2-10-70
AIRPLANE
OPERATIONS
MANUAL
Code
2 01
JUNE 28, 2002